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S1F70000 SeriesEPSON 5–21
Technical Manual
S1F77200Y Series
S1F77200Y
Series
SAMPLE CIRCUITS (S1F77200Y Series)
CR timer circuit
When the S1F77200Y circuit is configured as shown in Figure 5-16, it can be used as a CR timer circuit.
Figure 5-16 CR timer circuit
Battery backup circuit
The following is an example of the supply voltage switching circuit for the battery backup configured featuring the
S1F77200Y series.
Figure 5-17 Battery backup circuit
V
DD
V
CC
V
BAT
V
DD
V
O
V
SS
PNP transistor
NPN transistor
Enable signal
S1F77200Y
V
DD
V
DD
V
DD
V
O
V
SS
OUT
R
C
S1F77200Y